SFQ Fast Fourier Transform Circuit Using Localized SignalTransmission

我们设计并实现了一个用于快速傅立叶变换系统的4位超前进位加法器和4位并行乘法器。在~ 30 GHz的高频功能测试中，我们证实了CLA的成功运行。我们还证实了乘法器在低速测试中的成功操作。所制造的电路的组合实现了4位时间抽取基2蝶形单元的构建块，使我们能够构建FFT系统。

We have designed and implemented a 4-bit Carry Look-ahead Adder and 4-bit parallel multipliers for a Fast Fourier Transform system. In a high frequency functional test~30GHz, we confirmed the successful operation of the CLA. We also confirmed the successful operation of the multiplier in a low speed tests. The combination of the fabricated circuits realizes the building blocks of a 4-bit Decimation-in-Time radix 2 butterfly unit that enable us to construct an FFT system.